St. Louis, Missouri Weather:
Friday, September 18, 2026
Cloudy Weather
Day 91°
Night 70°
Precipitation 55 %
Wind 4 mph
UV Index (0 - 11+) 4
Weather Forecast History
Last Year's Weather on This Day (September 18, 2025)
Stormy Weather

Day

97°

Night

64°

Wind

5 mph

Precipitation

80 %